Advanced Materials,
Год журнала:
2024,
Номер
36(29)
Опубликована: Май 20, 2024
Mott-Schottky
construction
and
plasmon
excitation
represent
two
highly-efficient
closely-linked
coping
strategies
to
the
high
energy
loss
of
oxygen
evolution
reaction
(OER),
but
combined
effect
has
rarely
been
investigated.
Herein,
with
Ag
nanoparticles
as
electronic
structure
regulator
exciter,
Ag/CoV-LDH@G
nanohybrids
(NHs)
heterojunction
notable
are
well-designed.
Combining
theoretical
calculations
experiments,
it
is
found
that
modulates
Fermi
level/energy
band
CoV-LDH,
which
in
turn
leads
lowered
d-band
center
(from
-0.89
-0.93),
OER
barrier
6.78
1.31
eV),
preeminent
thermal/electronic
effects.
The
thermal
can
offset
endothermic
enthalpy
change
OER,
promote
deprotonation
*OOH,
accelerate
electron
transfer
kinetics.
Whereas
increase
density
charge
carriers
0.70
×
10
Journal of Materials Chemistry A,
Год журнала:
2023,
Номер
11(19), С. 10309 - 10318
Опубликована: Янв. 1, 2023
Utilization
of
bifunctional
high-efficiency
non-precious
electrocatalysts
for
stable
and
effective
water
splitting
is
crucial
to
the
growth
clean
energy
industry.
Abstract
Water
splitting
is
a
promising
technique
in
the
sustainable
“green
hydrogen”
generation
to
meet
energy
demands
of
modern
society.
Its
industrial
application
heavily
dependent
on
development
novel
catalysts
with
high
performance
and
low
cost
for
hydrogen
evolution
reaction
(HER).
As
typical
non‐precious
metal,
cobalt‐based
have
gained
tremendous
attention
recent
years
shown
great
prospect
commercialization.
However,
complexity
composition
structure
newly‐developed
Co‐based
make
it
urgent
comprehensively
retrospect
summarize
their
advance
design
strategies.
Hence,
this
review,
mechanism
HER
first
introduced
possible
role
Co
component
during
electrocatalysis
discussed.
Then,
various
strategies
that
could
effectively
enhance
intrinsic
activity
are
summarized,
including
surface
vacancy
engineering,
heteroatom
doping,
phase
facet
regulation,
heterostructure
construction,
support
effect.
The
progress
advanced
electrocatalysts
discussed,
emphasizing
above
can
significantly
improve
by
regulating
electronic
optimizing
binding
crucial
intermediates.
At
last,
prospects
challenges
according
viewpoint
from
fundamental
explorations
applications.
ACS Applied Energy Materials,
Год журнала:
2023,
Номер
6(17), С. 8818 - 8829
Опубликована: Авг. 29, 2023
In
order
to
fulfill
the
increasing
energy
demand
of
world,
water
electrolysis
comes
out
be
an
effective
method
for
producing
clean
H2
fuel.
To
catalyze
both
oxygen
evolution
reaction
(OER)
and
hydrogen
(HER)
in
splitting,
inexpensive
bifunctional
catalyst
is
highly
required.
serve
this
purpose,
3d
transition
metal-based
layer
double
hydroxides
(LDH)
proved
catalyst.
Here,
work,
we
have
synthesized
Sm-doped
NiCu-LDH
via
a
single-step
hydrothermal
method.
The
doping
rare-earth
Sm
ions
effectively
modifies
electronic
structure
by
enhancing
activity
active
metal
sites.
OER
HER,
10%
Sm@NiCu-LDH
demands
only
347
192
mV
overpotential
reach
50
mA
cm–2
current
density
along
with
Tafel
slope
values
70
109
dec–1,
respectively.
After
doping,
turnover
frequency
(TOF)
value
has
been
raised
more
than
twofold
compared
bare
NiCu-LDH.
For
total
splitting
(TWS),
when
was
used
as
anode
cathode,
it
1.629
V
cell
voltage
10
density.
Also,
shows
excellent
long-term
stability
robust
nature
48
h
alkaline
conditions.
results
improved
catalytic
activity.
Therefore,
work
paves
road
toward
searching
stable
electrocatalysts
means
providing
good
application.
Coordination Chemistry Reviews,
Год журнала:
2024,
Номер
504, С. 215644 - 215644
Опубликована: Янв. 17, 2024
Recent
years
have
witnessed
a
growing
global
demand
for
green,
sustainable,
and
reliable
energy
sources
in
response
to
the
effects
of
climate
change,
pollution,
crisis.
Consequently,
there
has
been
significant
focus
on
utilizing
water,
most
abundant
accessible
chemical
compound,
renewable
generation.
Electrocatalysis
pivotal
role
area
green
production,
serving
as
fundamental
component
sustainable
exceptionally
efficient
techniques.
To
achieve
this,
design
preparation
practical,
functional
groups
host/guest
compatible
materials
that
are
stable,
reusable,
noble-metal-free,
possess
structural
diversities
paramount
importance
electrochemical
water
splitting
(EWS)
systems.
Polyoxometalates
(POMs),
emerged
promising
electrocatalysts
past
two
decades,
offering
opportunities
achieving
aforementioned
goals.
POMs
exhibit
exceptional
qualities
such
redox
stability,
multiredox
capability,
tunable
intrinsic
extrinsic
properties
(e.g.,
structure
design,
surface
engineering,
interface
engineering),
well
desirable
ionic
conductivity.
However,
practical
applications
face
substantial
challenges,
including
issues
like
leaching,
agglomeration,
low
stability.
The
confinement
controlling
their
composition
proven
be
an
effective
strategy
tackling
issues,
garnering
attention
recent
years.
This
review
focuses
progress
advancement
application
POM-based
materials.
It
provides
thorough
exploration
diverse
host/substrate
materials,
comprising
carbon
nanotubes,
graphdiyne,
graphene,
nitrides,
conductive
polymers,
MOFs,
COFs,
CTFs,
LDHs,
metal
carbide
MXenes,
which
categorize
into
tubular,
layered,
porous
structures.
synthesis
strategies
these
examined,
elucidating
catalytic
activities.
Notably,
highlights
research
advancements
compounds
mechanisms,
particularly
EWS
overall
electrolysis,
tandem
anodic
hybrid
systems,
cathodic
decoupled
Addressing
challenges
presenting
future
perspectives,
this
aims
assist
selecting
robust
material
partnerships
integrating
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(5), С. 5965 - 5976
Опубликована: Янв. 24, 2024
The
development
of
low-cost,
efficient
catalysts
for
electrocatalytic
water
splitting
to
generate
green
hydrogen
is
a
hot
topic
among
researchers.
Herein,
we
have
developed
highly
heterostructure
CoCr-LDH
on
NiO
nickel
foam
(NF)
the
first
time.
preparation
strategy
follows
simple
annealing
cleaned
NF
without
using
any
Ni
salt
precursor,
followed
by
growth
nanosheets
over
surface-oxidized
NF.
CoCr-LDH/NiO/NF
catalyst
shows
excellent
activity
and
stability
toward
oxygen
evolution
reaction
(OER)
(HER)
in
1
M
KOH
solution.
For
OER,
only
253
mV
HER,
185
overpotentials
are
required
attain
50
mA
cm
